Calk-plate.



J. F. SMITH.

CALK PLATE.

APPLICATION FILED FEB. 5. 1917.

Patented Apr. 24, 1917.

JOSEPH F. SMITH, OF HEYBROOK, WASHINGTON.

CALK-IPLATE.

Specification of Letters Patent.

Patented Apr. 24, 1917.

Application filed February 5, 1917. Serial N 0. 146,611.

To all whom it may concern:

Be it known that I, JOSEPH F. SMITH, a citizen of the United States, anda resi dent of Heybrook, in the county of Snohomish and State ofWashington, have invented certain new and useful Improvements in Calk-Plates, of which the followin is a full, true, and exact specification.

My invention relates to calk plates and has for its principal object: toprovide an improved and novel means of removably attaching calks to thesoles of a shoe; to provide means for retaining the calks in cooperationwith the calk plate when the same is removed from the shoe. In loggingoper ations it is necessary that the workmen wear ca-lked shoes and theusual method of fixing the calks to the shoesis to drive them in thesoles. If the soles of the shoes are not very thick and of extremelyhard leather the calks become easily detached and it is frequentlynecessary to renew them. In renewing the calks it is also necessary todrive them in a new place in the sole, as otherwise they will fall outeasily. The repeated calking of the shoe soon renders the sole of theshoe leaky, and in other ways injures its life and usefulness.Applica-nts device is designed to overcome the above objections.

Other objects will appear as my invention is more fully explained in thefollowing specification, illustrated in the accompanying drawings andpointed out in the appended claims.

In the drawings Figure 1 is bottom plan view of applicants calk plateshown detached from the shoe. Fig. 2 is an enlarged fragmentarysectional elevation of the same.

Referring more particularly to the drawings, numeral 1 indicates a calkplate which is preferably formed of rather thin spring sheet steel, andwhich is cut away centrally as at 2, and is provided around itsperiphery, both internally and externally with slots 3. The slots arepreferably formed by stamping and the metal around them is somewhatraised as will be shown in Fig. 2 in order that a fiat headed calk 4 maybe inserted in one of the slots. Backing strip 5 is riveted to the upperside of calk plate 1 and is substantially the same shape, but withoutany slots so that the head of the calk will bear against the backingstrip. In placing the calks in the slots it is necessary to sep arate bymeans of a. pointed tool the calking plate and backing strip, afterwhich the head of the calk is easily slipped under the calking plate.The inherent spring of the calk plate holds the calks in place. T heentire device is then fastened on to the sole of the shoe in anyapproved manner, but preferably by means of screws in order that it maybe easily removed when it desired to use the shoes without the calks, orwhen it is necessary to place the calk plate upon another pair of shoes.A similar device, although of different shape may be utilized for theheels of the shoe if desired.

While I have shown a particular form of embodiment of my invention, I amaware that many minor changes therein will read ily suggest to othersskilled in the art without departing from the spirit and scope of theinvention, and I therefore desire to avoid being limited to the exactform shown and described.

Having described my invention, what I claim as new and desire to protectby Let ters Patent, is:

1. In a device of the class described, the

combination of a calk plate formed of spring material, and formed insubstantially the shape of the shoe sole, slots formed around theperiphery of the calk plate, a backing strip properly secured to theupper side of the calk plate, and flat headed calks which are retainedin the said slots by means of the inherent spring of the calk plate.

2. In a removably attachable calk plate, the combination of a springsteel plate, having notches cut around its edges, a backing strippermanently secured to the upper side of said plate, and flat headedcalks mounted in the said slits with the head between the backing stripand plate, whereby the inherent spring of the plate retains the calkwithin the slot.

JOSEPH F. SMITH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

